package com.chouxiaozi.sercurity.config;

import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.BadCredentialsException;
import org.springframework.security.authentication.LockedException;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.crypto.password.NoOpPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.AuthenticationFailureHandler;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
import org.springframework.security.web.authentication.logout.LogoutSuccessHandler;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashMap;
import java.util.Map;

@Configuration
public class securityConfig extends WebSecurityConfigurerAdapter {
    //spring5之后，security密码必须加密;下面是个过期的方法，使用不加密的密码
    @Bean
    PasswordEncoder passwordEncoder(){
        return NoOpPasswordEncoder.getInstance();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("chouxiaozi").password("123").roles("admin").and()
                .withUser("shuai").password("123").roles("user");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/admin/**").hasRole("admin")
                .antMatchers("/user/**").hasAnyRole("admin","user")
                //也可以下面这种写法
                //.antMatchers("/user/**").access("hasAnyRole('admin','user')")
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginProcessingUrl("/doLogin")
                .loginPage("/login") //登录页面或接口
                .usernameParameter("uname").passwordParameter("pwd")
                .successHandler(new AuthenticationSuccessHandler() {
                    @Override
                    public void onAuthenticationSuccess(HttpServletRequest req, HttpServletResponse resp, Authentication
                            authentication) throws IOException, ServletException {
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        Map<String,Object> map = new HashMap<>();
                        map.put("status",200);
                        map.put("msg",authentication.getPrincipal());
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                        out.close();
                    }
                })
                .failureHandler(new AuthenticationFailureHandler() {
                    @Override
                    public void onAuthenticationFailure(HttpServletRequest req, HttpServletResponse resp,
                                                        AuthenticationException e) throws IOException, ServletException {
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        Map<String,Object> map = new HashMap<>();
                        map.put("status",401);
                        if(e instanceof LockedException){
                            map.put("msg","账户被锁定，登录失败!");
                        }else if(e instanceof BadCredentialsException){
                            map.put("msg","用户名或密码错误，登录失败!");
                        }else {
                            map.put("msg","登录失败！");
                        }
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                        out.close();
                    }
                })
                .permitAll()
                .and()
                .logout()
                .logoutUrl("/logout")
                .logoutSuccessHandler(new LogoutSuccessHandler() {
                    @Override
                    public void onLogoutSuccess(HttpServletRequest req, HttpServletResponse resp,
                                                Authentication authentication) throws IOException, ServletException {
                        resp.setContentType("application/json;charset=utf-8");
                        PrintWriter out = resp.getWriter();
                        Map<String,Object> map = new HashMap<>();
                        map.put("status",200);
                        map.put("msg", "注销登录成功！");
                        out.write(new ObjectMapper().writeValueAsString(map));
                        out.flush();
                        out.close();
                    }
                })
                .and()
                .csrf().disable(); //便于postman调用，关闭csrf攻击
    }
}
